2nd task kr

int a1(const void* a){
    return (*(int*)a % 2 == 0 ? 1 : 0);
}

int a2(const void* a){
    if (*(double*)a < 0)
        *(double*)a = *(double*)a * (-1);

    int aa = (int)*(double*)a;

    int flag_1 = 0;
    if (aa % 2 == 0)
        flag_1 = 1;
    else
        return 0;

    int flag_2 = 0;
    if (*(double*)a - aa <= 0.000001)
        flag_2 = 1;
    else return 0;

    if (flag_2 == 1 && flag_1 == 1)
        return 1;
    else return 0;
}

int count_if(void* base, size_t num, size_t size, int (*pred)(const void*)){
    int res = 0;

    for (int i = 0; i < num; i++)
        if(pred((char*)base+i*size) == 1)
            ++res;
    return res;
}

int main(){

    int count = 20;
    void *arr;
    int size;
    scanf("%d", &size);
    int res = 0;
    switch(size){
        case 4:
            arr = (int*) malloc (count* sizeof(int));
            for (int i = 0; i < count; i++)
                scanf("%d", (int*)arr+i);

            res = count_if(arr, count, sizeof(int), a1);
            break;

        case 8:
            arr = (double*) malloc (count* sizeof(double));
            for (int i = 0; i < count; i++)
                scanf("%lf", (double*)arr+i);

            res = count_if(arr, count, sizeof(double), a2);
            break;
    }

    printf("%d\n", res);



    return 0;
}